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52
53#include <linux/module.h>
54#include <linux/i2o.h>
55
56#include <linux/mempool.h>
57
58#include <linux/genhd.h>
59#include <linux/blkdev.h>
60#include <linux/hdreg.h>
61
62#include <scsi/scsi.h>
63
64#include "i2o_block.h"
65
66#define OSM_NAME "block-osm"
67#define OSM_VERSION "1.325"
68#define OSM_DESCRIPTION "I2O Block Device OSM"
69
70static struct i2o_driver i2o_block_driver;
71
72
73static struct i2o_block_mempool i2o_blk_req_pool;
74
75
76static struct i2o_class_id i2o_block_class_id[] = {
77 {I2O_CLASS_RANDOM_BLOCK_STORAGE},
78 {I2O_CLASS_END}
79};
80
81
82
83
84
85
86
87static void i2o_block_device_free(struct i2o_block_device *dev)
88{
89 blk_cleanup_queue(dev->gd->queue);
90
91 put_disk(dev->gd);
92
93 kfree(dev);
94};
95
96
97
98
99
100
101
102
103
104static int i2o_block_remove(struct device *dev)
105{
106 struct i2o_device *i2o_dev = to_i2o_device(dev);
107 struct i2o_block_device *i2o_blk_dev = dev_get_drvdata(dev);
108
109 osm_info("device removed (TID: %03x): %s\n", i2o_dev->lct_data.tid,
110 i2o_blk_dev->gd->disk_name);
111
112 i2o_event_register(i2o_dev, &i2o_block_driver, 0, 0);
113
114 del_gendisk(i2o_blk_dev->gd);
115
116 dev_set_drvdata(dev, NULL);
117
118 i2o_device_claim_release(i2o_dev);
119
120 i2o_block_device_free(i2o_blk_dev);
121
122 return 0;
123};
124
125
126
127
128
129
130
131
132
133static int i2o_block_device_flush(struct i2o_device *dev)
134{
135 struct i2o_message *msg;
136
137 msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
138 if (IS_ERR(msg))
139 return PTR_ERR(msg);
140
141 msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
142 msg->u.head[1] =
143 cpu_to_le32(I2O_CMD_BLOCK_CFLUSH << 24 | HOST_TID << 12 | dev->
144 lct_data.tid);
145 msg->body[0] = cpu_to_le32(60 << 16);
146 osm_debug("Flushing...\n");
147
148 return i2o_msg_post_wait(dev->iop, msg, 60);
149};
150
151
152
153
154
155
156
157
158
159
160
161static int i2o_block_device_mount(struct i2o_device *dev, u32 media_id)
162{
163 struct i2o_message *msg;
164
165 msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
166 if (IS_ERR(msg))
167 return PTR_ERR(msg);
168
169 msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
170 msg->u.head[1] =
171 cpu_to_le32(I2O_CMD_BLOCK_MMOUNT << 24 | HOST_TID << 12 | dev->
172 lct_data.tid);
173 msg->body[0] = cpu_to_le32(-1);
174 msg->body[1] = cpu_to_le32(0x00000000);
175 osm_debug("Mounting...\n");
176
177 return i2o_msg_post_wait(dev->iop, msg, 2);
178};
179
180
181
182
183
184
185
186
187
188
189
190static int i2o_block_device_lock(struct i2o_device *dev, u32 media_id)
191{
192 struct i2o_message *msg;
193
194 msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
195 if (IS_ERR(msg))
196 return PTR_ERR(msg);
197
198 msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
199 msg->u.head[1] =
200 cpu_to_le32(I2O_CMD_BLOCK_MLOCK << 24 | HOST_TID << 12 | dev->
201 lct_data.tid);
202 msg->body[0] = cpu_to_le32(-1);
203 osm_debug("Locking...\n");
204
205 return i2o_msg_post_wait(dev->iop, msg, 2);
206};
207
208
209
210
211
212
213
214
215
216
217
218static int i2o_block_device_unlock(struct i2o_device *dev, u32 media_id)
219{
220 struct i2o_message *msg;
221
222 msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
223 if (IS_ERR(msg))
224 return PTR_ERR(msg);
225
226 msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
227 msg->u.head[1] =
228 cpu_to_le32(I2O_CMD_BLOCK_MUNLOCK << 24 | HOST_TID << 12 | dev->
229 lct_data.tid);
230 msg->body[0] = cpu_to_le32(media_id);
231 osm_debug("Unlocking...\n");
232
233 return i2o_msg_post_wait(dev->iop, msg, 2);
234};
235
236
237
238
239
240
241
242
243
244
245static int i2o_block_device_power(struct i2o_block_device *dev, u8 op)
246{
247 struct i2o_device *i2o_dev = dev->i2o_dev;
248 struct i2o_controller *c = i2o_dev->iop;
249 struct i2o_message *msg;
250 int rc;
251
252 msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
253 if (IS_ERR(msg))
254 return PTR_ERR(msg);
255
256 msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
257 msg->u.head[1] =
258 cpu_to_le32(I2O_CMD_BLOCK_POWER << 24 | HOST_TID << 12 | i2o_dev->
259 lct_data.tid);
260 msg->body[0] = cpu_to_le32(op << 24);
261 osm_debug("Power...\n");
262
263 rc = i2o_msg_post_wait(c, msg, 60);
264 if (!rc)
265 dev->power = op;
266
267 return rc;
268};
269
270
271
272
273
274
275
276
277
278static inline struct i2o_block_request *i2o_block_request_alloc(void)
279{
280 struct i2o_block_request *ireq;
281
282 ireq = mempool_alloc(i2o_blk_req_pool.pool, GFP_ATOMIC);
283 if (!ireq)
284 return ERR_PTR(-ENOMEM);
285
286 INIT_LIST_HEAD(&ireq->queue);
287 sg_init_table(ireq->sg_table, I2O_MAX_PHYS_SEGMENTS);
288
289 return ireq;
290};
291
292
293
294
295
296
297
298static inline void i2o_block_request_free(struct i2o_block_request *ireq)
299{
300 mempool_free(ireq, i2o_blk_req_pool.pool);
301};
302
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310
311
312
313static inline int i2o_block_sglist_alloc(struct i2o_controller *c,
314 struct i2o_block_request *ireq,
315 u32 ** mptr)
316{
317 int nents;
318 enum dma_data_direction direction;
319
320 ireq->dev = &c->pdev->dev;
321 nents = blk_rq_map_sg(ireq->req->q, ireq->req, ireq->sg_table);
322
323 if (rq_data_dir(ireq->req) == READ)
324 direction = PCI_DMA_FROMDEVICE;
325 else
326 direction = PCI_DMA_TODEVICE;
327
328 ireq->sg_nents = nents;
329
330 return i2o_dma_map_sg(c, ireq->sg_table, nents, direction, mptr);
331};
332
333
334
335
336
337
338
339static inline void i2o_block_sglist_free(struct i2o_block_request *ireq)
340{
341 enum dma_data_direction direction;
342
343 if (rq_data_dir(ireq->req) == READ)
344 direction = PCI_DMA_FROMDEVICE;
345 else
346 direction = PCI_DMA_TODEVICE;
347
348 dma_unmap_sg(ireq->dev, ireq->sg_table, ireq->sg_nents, direction);
349};
350
351
352
353
354
355
356
357
358
359
360
361static int i2o_block_prep_req_fn(struct request_queue *q, struct request *req)
362{
363 struct i2o_block_device *i2o_blk_dev = q->queuedata;
364 struct i2o_block_request *ireq;
365
366 if (unlikely(!i2o_blk_dev)) {
367 osm_err("block device already removed\n");
368 return BLKPREP_KILL;
369 }
370
371
372 if (!req->special) {
373 ireq = i2o_block_request_alloc();
374 if (IS_ERR(ireq)) {
375 osm_debug("unable to allocate i2o_block_request!\n");
376 return BLKPREP_DEFER;
377 }
378
379 ireq->i2o_blk_dev = i2o_blk_dev;
380 req->special = ireq;
381 ireq->req = req;
382 }
383
384 req->cmd_flags |= REQ_DONTPREP;
385
386 return BLKPREP_OK;
387};
388
389
390
391
392
393
394
395
396
397
398static void i2o_block_delayed_request_fn(struct work_struct *work)
399{
400 struct i2o_block_delayed_request *dreq =
401 container_of(work, struct i2o_block_delayed_request,
402 work.work);
403 struct request_queue *q = dreq->queue;
404 unsigned long flags;
405
406 spin_lock_irqsave(q->queue_lock, flags);
407 blk_start_queue(q);
408 spin_unlock_irqrestore(q->queue_lock, flags);
409 kfree(dreq);
410};
411
412
413
414
415
416
417
418
419
420
421static void i2o_block_end_request(struct request *req, int error,
422 int nr_bytes)
423{
424 struct i2o_block_request *ireq = req->special;
425 struct i2o_block_device *dev = ireq->i2o_blk_dev;
426 struct request_queue *q = req->q;
427 unsigned long flags;
428
429 if (blk_end_request(req, error, nr_bytes))
430 if (error)
431 blk_end_request_all(req, -EIO);
432
433 spin_lock_irqsave(q->queue_lock, flags);
434
435 if (likely(dev)) {
436 dev->open_queue_depth--;
437 list_del(&ireq->queue);
438 }
439
440 blk_start_queue(q);
441
442 spin_unlock_irqrestore(q->queue_lock, flags);
443
444 i2o_block_sglist_free(ireq);
445 i2o_block_request_free(ireq);
446};
447
448
449
450
451
452
453
454
455
456
457static int i2o_block_reply(struct i2o_controller *c, u32 m,
458 struct i2o_message *msg)
459{
460 struct request *req;
461 int error = 0;
462
463 req = i2o_cntxt_list_get(c, le32_to_cpu(msg->u.s.tcntxt));
464 if (unlikely(!req)) {
465 osm_err("NULL reply received!\n");
466 return -1;
467 }
468
469
470
471
472
473
474 if ((le32_to_cpu(msg->body[0]) >> 24) != 0) {
475 u32 status = le32_to_cpu(msg->body[0]);
476
477
478
479
480
481
482
483
484
485
486
487
488 osm_err("TID %03x error status: 0x%02x, detailed status: "
489 "0x%04x\n", (le32_to_cpu(msg->u.head[1]) >> 12 & 0xfff),
490 status >> 24, status & 0xffff);
491
492 req->errors++;
493
494 error = -EIO;
495 }
496
497 i2o_block_end_request(req, error, le32_to_cpu(msg->body[1]));
498
499 return 1;
500};
501
502static void i2o_block_event(struct work_struct *work)
503{
504 struct i2o_event *evt = container_of(work, struct i2o_event, work);
505 osm_debug("event received\n");
506 kfree(evt);
507};
508
509
510
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531
532#define BLOCK_SIZE_528M 1081344
533#define BLOCK_SIZE_1G 2097152
534#define BLOCK_SIZE_21G 4403200
535#define BLOCK_SIZE_42G 8806400
536#define BLOCK_SIZE_84G 17612800
537
538static void i2o_block_biosparam(unsigned long capacity, unsigned short *cyls,
539 unsigned char *hds, unsigned char *secs)
540{
541 unsigned long heads, sectors, cylinders;
542
543 sectors = 63L;
544 if (capacity <= BLOCK_SIZE_528M)
545 heads = 16;
546 else if (capacity <= BLOCK_SIZE_1G)
547 heads = 32;
548 else if (capacity <= BLOCK_SIZE_21G)
549 heads = 64;
550 else if (capacity <= BLOCK_SIZE_42G)
551 heads = 128;
552 else
553 heads = 255;
554
555 cylinders = (unsigned long)capacity / (heads * sectors);
556
557 *cyls = (unsigned short)cylinders;
558 *secs = (unsigned char)sectors;
559 *hds = (unsigned char)heads;
560}
561
562
563
564
565
566
567
568
569
570
571
572static int i2o_block_open(struct block_device *bdev, fmode_t mode)
573{
574 struct i2o_block_device *dev = bdev->bd_disk->private_data;
575
576 if (!dev->i2o_dev)
577 return -ENODEV;
578
579 if (dev->power > 0x1f)
580 i2o_block_device_power(dev, 0x02);
581
582 i2o_block_device_mount(dev->i2o_dev, -1);
583
584 i2o_block_device_lock(dev->i2o_dev, -1);
585
586 osm_debug("Ready.\n");
587
588 return 0;
589};
590
591
592
593
594
595
596
597
598
599
600
601static int i2o_block_release(struct gendisk *disk, fmode_t mode)
602{
603 struct i2o_block_device *dev = disk->private_data;
604 u8 operation;
605
606
607
608
609
610
611
612
613
614 if (!dev->i2o_dev)
615 return 0;
616
617 i2o_block_device_flush(dev->i2o_dev);
618
619 i2o_block_device_unlock(dev->i2o_dev, -1);
620
621 if (dev->flags & (1 << 3 | 1 << 4))
622 operation = 0x21;
623 else
624 operation = 0x24;
625
626 i2o_block_device_power(dev, operation);
627
628 return 0;
629}
630
631static int i2o_block_getgeo(struct block_device *bdev, struct hd_geometry *geo)
632{
633 i2o_block_biosparam(get_capacity(bdev->bd_disk),
634 &geo->cylinders, &geo->heads, &geo->sectors);
635 return 0;
636}
637
638
639
640
641
642
643
644
645
646
647
648
649static int i2o_block_ioctl(struct block_device *bdev, fmode_t mode,
650 unsigned int cmd, unsigned long arg)
651{
652 struct gendisk *disk = bdev->bd_disk;
653 struct i2o_block_device *dev = disk->private_data;
654
655
656
657 if (!capable(CAP_SYS_ADMIN))
658 return -EPERM;
659
660 switch (cmd) {
661 case BLKI2OGRSTRAT:
662 return put_user(dev->rcache, (int __user *)arg);
663 case BLKI2OGWSTRAT:
664 return put_user(dev->wcache, (int __user *)arg);
665 case BLKI2OSRSTRAT:
666 if (arg < 0 || arg > CACHE_SMARTFETCH)
667 return -EINVAL;
668 dev->rcache = arg;
669 break;
670 case BLKI2OSWSTRAT:
671 if (arg != 0
672 && (arg < CACHE_WRITETHROUGH || arg > CACHE_SMARTBACK))
673 return -EINVAL;
674 dev->wcache = arg;
675 break;
676 }
677 return -ENOTTY;
678};
679
680
681
682
683
684
685
686
687
688static int i2o_block_media_changed(struct gendisk *disk)
689{
690 struct i2o_block_device *p = disk->private_data;
691
692 if (p->media_change_flag) {
693 p->media_change_flag = 0;
694 return 1;
695 }
696 return 0;
697}
698
699
700
701
702
703
704
705
706
707
708
709
710static int i2o_block_transfer(struct request *req)
711{
712 struct i2o_block_device *dev = req->rq_disk->private_data;
713 struct i2o_controller *c;
714 u32 tid = dev->i2o_dev->lct_data.tid;
715 struct i2o_message *msg;
716 u32 *mptr;
717 struct i2o_block_request *ireq = req->special;
718 u32 tcntxt;
719 u32 sgl_offset = SGL_OFFSET_8;
720 u32 ctl_flags = 0x00000000;
721 int rc;
722 u32 cmd;
723
724 if (unlikely(!dev->i2o_dev)) {
725 osm_err("transfer to removed drive\n");
726 rc = -ENODEV;
727 goto exit;
728 }
729
730 c = dev->i2o_dev->iop;
731
732 msg = i2o_msg_get(c);
733 if (IS_ERR(msg)) {
734 rc = PTR_ERR(msg);
735 goto exit;
736 }
737
738 tcntxt = i2o_cntxt_list_add(c, req);
739 if (!tcntxt) {
740 rc = -ENOMEM;
741 goto nop_msg;
742 }
743
744 msg->u.s.icntxt = cpu_to_le32(i2o_block_driver.context);
745 msg->u.s.tcntxt = cpu_to_le32(tcntxt);
746
747 mptr = &msg->body[0];
748
749 if (rq_data_dir(req) == READ) {
750 cmd = I2O_CMD_BLOCK_READ << 24;
751
752 switch (dev->rcache) {
753 case CACHE_PREFETCH:
754 ctl_flags = 0x201F0008;
755 break;
756
757 case CACHE_SMARTFETCH:
758 if (blk_rq_sectors(req) > 16)
759 ctl_flags = 0x201F0008;
760 else
761 ctl_flags = 0x001F0000;
762 break;
763
764 default:
765 break;
766 }
767 } else {
768 cmd = I2O_CMD_BLOCK_WRITE << 24;
769
770 switch (dev->wcache) {
771 case CACHE_WRITETHROUGH:
772 ctl_flags = 0x001F0008;
773 break;
774 case CACHE_WRITEBACK:
775 ctl_flags = 0x001F0010;
776 break;
777 case CACHE_SMARTBACK:
778 if (blk_rq_sectors(req) > 16)
779 ctl_flags = 0x001F0004;
780 else
781 ctl_flags = 0x001F0010;
782 break;
783 case CACHE_SMARTTHROUGH:
784 if (blk_rq_sectors(req) > 16)
785 ctl_flags = 0x001F0004;
786 else
787 ctl_flags = 0x001F0010;
788 default:
789 break;
790 }
791 }
792
793#ifdef CONFIG_I2O_EXT_ADAPTEC
794 if (c->adaptec) {
795 u8 cmd[10];
796 u32 scsi_flags;
797 u16 hwsec;
798
799 hwsec = queue_logical_block_size(req->q) >> KERNEL_SECTOR_SHIFT;
800 memset(cmd, 0, 10);
801
802 sgl_offset = SGL_OFFSET_12;
803
804 msg->u.head[1] =
805 cpu_to_le32(I2O_CMD_PRIVATE << 24 | HOST_TID << 12 | tid);
806
807 *mptr++ = cpu_to_le32(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC);
808 *mptr++ = cpu_to_le32(tid);
809
810
811
812
813
814
815 if (rq_data_dir(req) == READ) {
816 cmd[0] = READ_10;
817 scsi_flags = 0x60a0000a;
818 } else {
819 cmd[0] = WRITE_10;
820 scsi_flags = 0xa0a0000a;
821 }
822
823 *mptr++ = cpu_to_le32(scsi_flags);
824
825 *((u32 *) & cmd[2]) = cpu_to_be32(blk_rq_pos(req) * hwsec);
826 *((u16 *) & cmd[7]) = cpu_to_be16(blk_rq_sectors(req) * hwsec);
827
828 memcpy(mptr, cmd, 10);
829 mptr += 4;
830 *mptr++ = cpu_to_le32(blk_rq_bytes(req));
831 } else
832#endif
833 {
834 msg->u.head[1] = cpu_to_le32(cmd | HOST_TID << 12 | tid);
835 *mptr++ = cpu_to_le32(ctl_flags);
836 *mptr++ = cpu_to_le32(blk_rq_bytes(req));
837 *mptr++ =
838 cpu_to_le32((u32) (blk_rq_pos(req) << KERNEL_SECTOR_SHIFT));
839 *mptr++ =
840 cpu_to_le32(blk_rq_pos(req) >> (32 - KERNEL_SECTOR_SHIFT));
841 }
842
843 if (!i2o_block_sglist_alloc(c, ireq, &mptr)) {
844 rc = -ENOMEM;
845 goto context_remove;
846 }
847
848 msg->u.head[0] =
849 cpu_to_le32(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | sgl_offset);
850
851 list_add_tail(&ireq->queue, &dev->open_queue);
852 dev->open_queue_depth++;
853
854 i2o_msg_post(c, msg);
855
856 return 0;
857
858 context_remove:
859 i2o_cntxt_list_remove(c, req);
860
861 nop_msg:
862 i2o_msg_nop(c, msg);
863
864 exit:
865 return rc;
866};
867
868
869
870
871
872
873
874
875
876static void i2o_block_request_fn(struct request_queue *q)
877{
878 struct request *req;
879
880 while (!blk_queue_plugged(q)) {
881 req = blk_peek_request(q);
882 if (!req)
883 break;
884
885 if (blk_fs_request(req)) {
886 struct i2o_block_delayed_request *dreq;
887 struct i2o_block_request *ireq = req->special;
888 unsigned int queue_depth;
889
890 queue_depth = ireq->i2o_blk_dev->open_queue_depth;
891
892 if (queue_depth < I2O_BLOCK_MAX_OPEN_REQUESTS) {
893 if (!i2o_block_transfer(req)) {
894 blk_start_request(req);
895 continue;
896 } else
897 osm_info("transfer error\n");
898 }
899
900 if (queue_depth)
901 break;
902
903
904 dreq = kmalloc(sizeof(*dreq), GFP_ATOMIC);
905 if (!dreq)
906 continue;
907
908 dreq->queue = q;
909 INIT_DELAYED_WORK(&dreq->work,
910 i2o_block_delayed_request_fn);
911
912 if (!queue_delayed_work(i2o_block_driver.event_queue,
913 &dreq->work,
914 I2O_BLOCK_RETRY_TIME))
915 kfree(dreq);
916 else {
917 blk_stop_queue(q);
918 break;
919 }
920 } else {
921 blk_start_request(req);
922 __blk_end_request_all(req, -EIO);
923 }
924 }
925};
926
927
928static const struct block_device_operations i2o_block_fops = {
929 .owner = THIS_MODULE,
930 .open = i2o_block_open,
931 .release = i2o_block_release,
932 .locked_ioctl = i2o_block_ioctl,
933 .getgeo = i2o_block_getgeo,
934 .media_changed = i2o_block_media_changed
935};
936
937
938
939
940
941
942
943
944
945
946static struct i2o_block_device *i2o_block_device_alloc(void)
947{
948 struct i2o_block_device *dev;
949 struct gendisk *gd;
950 struct request_queue *queue;
951 int rc;
952
953 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
954 if (!dev) {
955 osm_err("Insufficient memory to allocate I2O Block disk.\n");
956 rc = -ENOMEM;
957 goto exit;
958 }
959
960 INIT_LIST_HEAD(&dev->open_queue);
961 spin_lock_init(&dev->lock);
962 dev->rcache = CACHE_PREFETCH;
963 dev->wcache = CACHE_WRITEBACK;
964
965
966 gd = alloc_disk(16);
967 if (!gd) {
968 osm_err("Insufficient memory to allocate gendisk.\n");
969 rc = -ENOMEM;
970 goto cleanup_dev;
971 }
972
973
974 queue = blk_init_queue(i2o_block_request_fn, &dev->lock);
975 if (!queue) {
976 osm_err("Insufficient memory to allocate request queue.\n");
977 rc = -ENOMEM;
978 goto cleanup_queue;
979 }
980
981 blk_queue_prep_rq(queue, i2o_block_prep_req_fn);
982
983 gd->major = I2O_MAJOR;
984 gd->queue = queue;
985 gd->fops = &i2o_block_fops;
986 gd->private_data = dev;
987
988 dev->gd = gd;
989
990 return dev;
991
992 cleanup_queue:
993 put_disk(gd);
994
995 cleanup_dev:
996 kfree(dev);
997
998 exit:
999 return ERR_PTR(rc);
1000};
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011static int i2o_block_probe(struct device *dev)
1012{
1013 struct i2o_device *i2o_dev = to_i2o_device(dev);
1014 struct i2o_controller *c = i2o_dev->iop;
1015 struct i2o_block_device *i2o_blk_dev;
1016 struct gendisk *gd;
1017 struct request_queue *queue;
1018 static int unit = 0;
1019 int rc;
1020 u64 size;
1021 u32 blocksize;
1022 u16 body_size = 4;
1023 u16 power;
1024 unsigned short max_sectors;
1025
1026#ifdef CONFIG_I2O_EXT_ADAPTEC
1027 if (c->adaptec)
1028 body_size = 8;
1029#endif
1030
1031 if (c->limit_sectors)
1032 max_sectors = I2O_MAX_SECTORS_LIMITED;
1033 else
1034 max_sectors = I2O_MAX_SECTORS;
1035
1036
1037 if (i2o_dev->lct_data.user_tid != 0xfff) {
1038 osm_debug("skipping used device %03x\n", i2o_dev->lct_data.tid);
1039 return -ENODEV;
1040 }
1041
1042 if (i2o_device_claim(i2o_dev)) {
1043 osm_warn("Unable to claim device. Installation aborted\n");
1044 rc = -EFAULT;
1045 goto exit;
1046 }
1047
1048 i2o_blk_dev = i2o_block_device_alloc();
1049 if (IS_ERR(i2o_blk_dev)) {
1050 osm_err("could not alloc a new I2O block device");
1051 rc = PTR_ERR(i2o_blk_dev);
1052 goto claim_release;
1053 }
1054
1055 i2o_blk_dev->i2o_dev = i2o_dev;
1056 dev_set_drvdata(dev, i2o_blk_dev);
1057
1058
1059 gd = i2o_blk_dev->gd;
1060 gd->first_minor = unit << 4;
1061 sprintf(gd->disk_name, "i2o/hd%c", 'a' + unit);
1062 gd->driverfs_dev = &i2o_dev->device;
1063
1064
1065 queue = gd->queue;
1066 queue->queuedata = i2o_blk_dev;
1067
1068 blk_queue_max_phys_segments(queue, I2O_MAX_PHYS_SEGMENTS);
1069 blk_queue_max_sectors(queue, max_sectors);
1070 blk_queue_max_hw_segments(queue, i2o_sg_tablesize(c, body_size));
1071
1072 osm_debug("max sectors = %d\n", queue->max_sectors);
1073 osm_debug("phys segments = %d\n", queue->max_phys_segments);
1074 osm_debug("max hw segments = %d\n", queue->max_hw_segments);
1075
1076
1077
1078
1079
1080 if (!i2o_parm_field_get(i2o_dev, 0x0004, 1, &blocksize, 4) ||
1081 !i2o_parm_field_get(i2o_dev, 0x0000, 3, &blocksize, 4)) {
1082 blk_queue_logical_block_size(queue, le32_to_cpu(blocksize));
1083 } else
1084 osm_warn("unable to get blocksize of %s\n", gd->disk_name);
1085
1086 if (!i2o_parm_field_get(i2o_dev, 0x0004, 0, &size, 8) ||
1087 !i2o_parm_field_get(i2o_dev, 0x0000, 4, &size, 8)) {
1088 set_capacity(gd, le64_to_cpu(size) >> KERNEL_SECTOR_SHIFT);
1089 } else
1090 osm_warn("could not get size of %s\n", gd->disk_name);
1091
1092 if (!i2o_parm_field_get(i2o_dev, 0x0000, 2, &power, 2))
1093 i2o_blk_dev->power = power;
1094
1095 i2o_event_register(i2o_dev, &i2o_block_driver, 0, 0xffffffff);
1096
1097 add_disk(gd);
1098
1099 unit++;
1100
1101 osm_info("device added (TID: %03x): %s\n", i2o_dev->lct_data.tid,
1102 i2o_blk_dev->gd->disk_name);
1103
1104 return 0;
1105
1106 claim_release:
1107 i2o_device_claim_release(i2o_dev);
1108
1109 exit:
1110 return rc;
1111};
1112
1113
1114static struct i2o_driver i2o_block_driver = {
1115 .name = OSM_NAME,
1116 .event = i2o_block_event,
1117 .reply = i2o_block_reply,
1118 .classes = i2o_block_class_id,
1119 .driver = {
1120 .probe = i2o_block_probe,
1121 .remove = i2o_block_remove,
1122 },
1123};
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133static int __init i2o_block_init(void)
1134{
1135 int rc;
1136 int size;
1137
1138 printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");
1139
1140
1141 size = sizeof(struct i2o_block_request);
1142 i2o_blk_req_pool.slab = kmem_cache_create("i2o_block_req", size, 0,
1143 SLAB_HWCACHE_ALIGN, NULL);
1144 if (!i2o_blk_req_pool.slab) {
1145 osm_err("can't init request slab\n");
1146 rc = -ENOMEM;
1147 goto exit;
1148 }
1149
1150 i2o_blk_req_pool.pool =
1151 mempool_create_slab_pool(I2O_BLOCK_REQ_MEMPOOL_SIZE,
1152 i2o_blk_req_pool.slab);
1153 if (!i2o_blk_req_pool.pool) {
1154 osm_err("can't init request mempool\n");
1155 rc = -ENOMEM;
1156 goto free_slab;
1157 }
1158
1159
1160 rc = register_blkdev(I2O_MAJOR, "i2o_block");
1161 if (rc) {
1162 osm_err("unable to register block device\n");
1163 goto free_mempool;
1164 }
1165#ifdef MODULE
1166 osm_info("registered device at major %d\n", I2O_MAJOR);
1167#endif
1168
1169
1170 rc = i2o_driver_register(&i2o_block_driver);
1171 if (rc) {
1172 osm_err("Could not register Block driver\n");
1173 goto unregister_blkdev;
1174 }
1175
1176 return 0;
1177
1178 unregister_blkdev:
1179 unregister_blkdev(I2O_MAJOR, "i2o_block");
1180
1181 free_mempool:
1182 mempool_destroy(i2o_blk_req_pool.pool);
1183
1184 free_slab:
1185 kmem_cache_destroy(i2o_blk_req_pool.slab);
1186
1187 exit:
1188 return rc;
1189};
1190
1191
1192
1193
1194
1195
1196
1197static void __exit i2o_block_exit(void)
1198{
1199
1200 i2o_driver_unregister(&i2o_block_driver);
1201
1202
1203 unregister_blkdev(I2O_MAJOR, "i2o_block");
1204
1205
1206 mempool_destroy(i2o_blk_req_pool.pool);
1207 kmem_cache_destroy(i2o_blk_req_pool.slab);
1208};
1209
1210MODULE_AUTHOR("Red Hat");
1211MODULE_LICENSE("GPL");
1212MODULE_DESCRIPTION(OSM_DESCRIPTION);
1213MODULE_VERSION(OSM_VERSION);
1214
1215module_init(i2o_block_init);
1216module_exit(i2o_block_exit);
1217